Compiler/CC3220SF-LAUNCHXL: Populate a structure from fixed-width fields

Part Number: CC3220SF-LAUNCHXL

Tool/software: TI C/C++ Compiler

I have a struct like this:

typedef struct
{
    _u32 time;  // 4 bytes
    _u32 cnt;   // 4
    _i16 temp;  // 2
    _u16 humy;  // 2
    _u16 batt;  // 2
    _u8 rssi;   // 1
} record_t;

I would like to convert it to a 4+4+2+2+1=13 bytes array to store it on a flash memory and easy retrieve it. Example:

record_t record;
record.time=1510054330;
record.cnt=12345;
// populate other fields

_u8 *raw = &record;

WriteToFlash(address, raw, 13);

//

ReadFromFlash(another_address, &raw, 13);
// now raw contains the new data

// how to assign the content to the record variable?

I'm afraid about any padding or alignment in data type. Of course I can do it manually, field by field, but if there's a direct (and reliable) way it would be nice.